"Emotional reassurance" means providing comfort and support to someone to help them feel better and less anxious or worried about their emotions or a situation. Full definition
It was mentioned previously that breast feeding can provide emotional reassurance. (babycenter.com)
Her most critical role is providing continuous emotional reassurance and comfort. (motherscircle.net)
The child should be able to receive emotional reassurance through a primary caregiver (staff member of an early learning centre, kindergarten or primary school). (kidsmatter.edu.au)